DIF detection methods identify the difference between the performances of subgroups when the subgroups are matched by
examinees' ability level or a proxy variable, such as total test score (Holland & Wainer, 1993). Log-linear Models (LLM) method is one
of the DIF detection methods. This method was first introduced by Mellenbergh (1982) to investigate the relationship among item responses,
subgroups, and categorized total test score in terms of DIF detection. This study examined the performance of LLM as a DIF detection
method for dichotomous items and polytomous items. LLM method was compared with Mantel-Haenszsel (MH) and logistic regression (LR) methods
to detect uniform DIF and with LR to detect non-uniform DIF in dichotomous item response data. MH was not included in non-uniform DIF
detection, because, the previous studies indicated that it is not able to detect non-uniform DIF (Narayanon & Swaminathan, 1996;
Uttaro & Milsap, 1994). In addition, LLM was compared with Mantel, generalized Mantel-Haenszsel (GMH), ordinal logistic regression
(OLR), logistic discriminate function analysis (LDFA) methods in polytomous item response data. For this purpose, both simulation study
and empirical study were conducted under various sample sizes, ability mean differences (impact) and item parameters. Since the previous
studies did not investigate the effect of ability mean differences on DIF detection with LLM, this study also focused on the effect of
ability mean differences between subgroups. This study found that MH was better to detect uniform DIF when LR and LLM indicated equally
well performance on uniform and non-uniform DIF detection. In Addition, GMH and LLM performed better than Mantel, OLR, and LDFA for the
polytomous item response data. / A Dissertation submitted to the Department of Educational Psychology and Learning Systems in partial
fulfillment of the Doctor of Philosophy. / Spring Semester 2016. / April 14, 2016. / Includes bibliographical references. / Insu Paek, Professor Directing Dissertation; Fred Huffer, University Representative; Betsy Jane
Becker, Committee Member; Russell Almond, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_360489 |
| Contributors | Yesiltas, Gonca (authoraut), Paek, Insu (professor directing dissertation), Huffer, Fred W. (Fred William) (university representative), Becker, Betsy Jane (committee member), Almond, Russell G. (committee member), Florida State University (degree granting institution), College of Education (degree granting college), Department of Educational Psychology and Learning Systems (degree granting department) |
| Publisher | Florida State University, Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (136 pages), computer, application/pdf |
| Rights | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. |
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